| 1. | Study of triangulated irregular network andinterpolating terra in elevation in railway location
铁路线路三角网数模及地面高程内插系统研究 |
| 2. | The author introduces arithmetic from triangulated irregular network to regular square grid dem because the latter apply abroad than the former in fact
考虑到规则格网dem在实际应用中比tin更加广泛，介绍了从tin到规则格网dem的内插算法。 |
| 3. | The irregularity sum e ( g ) of the graph g is the minimum sum of vertex labels among all irregular networks having g as an underlying graph . a garph g for wich ( g ) = n + ( n2 ) is called consecutive
图g的非正则和是在所有以g为基础图的非正则网络中，各顶点标号的和为最小的值，记为( g ) 。 |
| 4. | According to geochemistry data and geochemistry work , i build a geochemistry digital model of triangulated irregular network , which can auto trace multi - work area and multi - hole by judging limited length
建立了适用于地球化学数据处理的不规则三角网数字模型，即多工区，多“洞”的自动生成不规则三角网模型。 |
| 5. | Thirdly , it utilizes line tracking and douglas - peucker line - simplification algorithm to realize the raster - to - vector conversion . a triangulated irregular network ( tin ) is constructed based on vector data , and dem point - array data is computed by interpolating grid on tin
第三,使用轮廓线跟踪算法和dpl多边形近似方法实现等高线数据的矢量转换;并基于等高线矢量数据建立不规则三角网,再内插格网生成dem点阵数据。 |
| 6. | Two kinds of multi - resolution spatial data model are studied in this paper . one is the feature model and hoom model based on dlg data . the other is multi - resolution dem model based on terrain data using the algorithms of self - adaptive triangular regular networks and hierarchical triangular irregular networks
论文主要对两种类型的多分辨率空间数据模型理论和实现技术进行研究，第一类空间数据是数字线划图数据dlg ，第二类是数字高程模型数据dem 。 |
| 7. | After the paper sufficiently considered creation algorithmic of triangulated irregular network in time and space and analyzed three creation algorithms of tin - divide - conquer , triangulation growth , incremental insertion , the paper adopts to a new algorithm that takes advantages of divide - conquer and triangulation growth . it can create tin quickly . the paper also uses break lines , terrain feature lines , building borderlines to be restriction condition and creates triangulated irregular network based on restriction
综合考虑不规则三角网生成算法的时间和空间性能，分析了常用的三种tin生成算法：分割-归并法、三角网生长法和逐点插入法，笔者采用分割-归并法与三角网生长法相结合的算法，快速生成了tin ，并以断裂线、地性线、建筑物边界为约束条件，最终生成具有约束的不规则三角网。 |
| 8. | This paper uses digital line graphs for original data . after author bases on large - scale relief map " feature and analyses the feature , data structure and creation algorithms of two main representation shape ? triangulated irregular network and regular grid , author provides a kind of method that large - scale dem is created from tin which is created from large - scale dlg
本文以数字线化图为原始数据，针对大比例地形图的特点，在分析了数字高程模型的两种主要表现形式? ?不规则三角网tin和规则格网grid的特点、数据结构、生成算法的基础上，考虑到大比例尺数字高程模型能最大限度符合实际地形特点，提出了一种从大比例尺数字线化图dlg生成不规则三角网tin ，再由不规则三角网内插生成大比例尺数字高程模型grid的方法。 |
| 9. | Key issues on multi - resolution representation and real - time simplification algorithms of multi - resolution of terrain model are then studied , which are simplification algorithms of dem , relativity calculation , off - line calculation , region division calculation , visibility calculation depending on fov ( field of view ) and error control , and real - time reality rendering . the simplification algorithms of self - adaptive triangulation regular networks and hierarchical triangulation irregular networks basically depending on fov are thoroughly studied . in the end , based on theories and methods discussed in this paper , a gis platform named hypergis and hyperterrain of terrain visualization software are developed and implemented
并以jarnopeschie的算法为基础，全面研究了路网的自动综合算法通过分析研究多分辨率地形表现模型和实时地形简化应解决的关键技术问题，进一步研究了规则三角形网和顾及地面特征点线的不规则三角形依赖于视点的多分辨率地形模型简化算法；应用研究所取得的理论和方法，开发了系统实现模拟软件hypergis和hyperterrain 。 |
| 10. | This paper is about of arithmetic studys of triangulated irregular network which is published in abroad and home , and alter an arithmetic of delaunay triangulation using a uniform grid which was present by tsung - pao fang and les a . piegl of university of south florida . in this paper i present implementation details , test , examples of the arithmetic , moreover . a triangulated irregular network model of is built for geochemistry
本文在前人研究的基础上，探讨和研究了国内外的不规则三角网生成算法，通过理论和实验选择了tsung - paofang和les . piegl提出的delaunay三角网生成算法作为数字地面模型的核心算法，并对该算法进行了改进和优化。 |
